Motorola DSP56301 - Manual (Page 348)

Programming Sheets
B -36 DSP56301 User’s Manual
Figure B-24. SCI Clock Control Registers (SCCR)
Application: Date:
Programmer:
Sheet 2 of 2
SCI
SCI Clock Control Register (SCCR)
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
CD7 CD5 CD4 CD3 CD2 CD1 CD0
23
* = Reserved, Program as 0
CD6 *
0
TCM RCM SCP COD CD11 CD10 CD9 CD8
Clock Divider Bits (CD11–CD0)
CD11–CD0 I
cyc
Rate
$000 I cyc /1
$001 I cyc /2
$002 I cyc /3
• •
• •
• •
$FFE I cyc /4095
$FFF I cyc /4096
SCI Clock Prescaler
0 = ч1 1 = ч 8
Clock Out Divider
0 = Divide clock by 16 before feed to SCLK
1 = Feed clock to directly to SCLK
TCM RCM TX Clock RX Clock SCLK Pin Mode
0 0 Internal Internal Output Synchronous/Asynchronous
0 1 Internal External Input Asynchronous only
1 0 External Internal Input Asynchronous only
1 1 External External Input Synchronous/Asynchronous
Receiver Clock Mode/Source
0 = Internal clock for Receiver
1 = External clock from SCLK
Transmitter Clock Mode/Source
0 = Internal clock for Transmitter
1 = External clock from SCLK
Address X:$FFFF9B Read/Write
Reset = $000000